mezzio
The Force is weak in ^^
I'll ask it again. WHY do you want a new nut? Is the stock one binding and causing tuning issues? If so, thats what nutfiles can be used for.
As for any tonal difference...the second you fret a string the nut id out of the equation. Nuts dont make tone. Maybe on the open strings...slightly...but yeah...
It's a popular misconception that all SE PRS guitars need a new nut or that a nut is going to improve your tone. It wont.
Well, one reason is, it's cheaper to buy a $8 nut than it is to take a guitar in to have the slots filed bigger, or pay $13/ea for the slot files you need for a single project. Lets not forget personal preference either, some people just want it, so they do it.